Hydrant.



No. 673,666. Patented May 7, l90l. J. .1. SULLIVAN.

HYDRANT.

(Application filed Dec. 3, 1900.)

(No Model.)

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UNTTED STATES.

PATENT OFFICE.

JOHN J. SULLIVAN, OF HOLYOKE, MASSACHUSETTS.

HYDRANT.

SPECIFICATION formingpart of Letters Patent N 0. 673,666, dated May '7,1901.

Application filed December 3, 1900. Serial No. 38AM. \No 1110(181-4 Toall whom it may concern:

Be it known that I, J OHN J. SULLIVAN, a citizen of the United States ofAmerica, and a resident of Holyoke, in the county of Hampden and Stateof Massachusetts,have invented certain new and useful Improvements inHydrants, of which the following is a full, clear, and exactdescription.

My invention relates to an improvement in hydrants of a class in whichthere is a main valve which closes against the valve-seat in the usualmanner, combined with a smaller valve secured to the valve-stem abovethe main one and which smaller valve is of very little less diameterthan the cylindrical waterpassage in the lower end of the passage and inwhich it is located when the flow of water is shut off.

The object of the invention is to simplify the construction of the partsfor an easilyadjusted assemblage and connection on the valve-stem orshaft and to permit readily a removal of the main valve as occasion mayrequire.

The accompanying drawing represents a vertical section of a hydrantwhich embodies my invention.

A represents the hydrant-casing, which may be of any suitableconstruction and which is secured to the water-main B at its lower endin the usual manner. The hydrant-casing has in its lower end thecylindrical bushing a, which at its lower end is constructed with adownwardly-flaring valve-seat b.

Secured to the lower end of the valve-rod O,the lower portion of whichis screw-threaded from its end'upwardly, as indicated at 10, is the mainvalve D, of any suitable construction,and' which when closed fitstightly against the tapering valve-seat formed upon the lower end of thecylindrical water-passage F, placed in the lower end of the casing A,where it makes connection with thewater-main B.

Secured to the valve-stem C by screwthreading thereon at a shortdistance above the main valve D is a smaller thin cylindrical valve ordisk G, which is of very little less diameter than the cylindricalpassage F. These two valves are separated but a very slight distance, asshown, and the valve G enters the lower end of the cylinder F before thevalve D comes in contact with its seat.

As the valve G is of smaller diameter than the main one, D, as thissmaller valve G enters the lower end of the cylinder F the flow of waterthrough the hydrant or plug is so gradually cut off that the fiow in themain B is checked, and the consequence is that when the main valve Dseats itself there is but a very small amount of flow for it to check,and hence the water in the main does not surge back and forth in such amanner as to cause waterhammering, as is done when the flow is suddenlyshut off by quickly closing the valve D in the usual manner.

As specifically shown and as materially contributing in the compositionof the present invention for convenience,practicability,

'and general availability of the invention,

the secondary or diametrically smaller disk or plinth valve G isconstructed integrally with a neck d and a flange-rest (1, extendedtherebelow, and with a concentric polygonal axial projection f extendingthereabove. This integrally-formed part f G d is axially bored andscrew-tapped and screw engaged and adjusted on the threaded valve-rod.The valve D,as shown, is in the form of a frustoconical part, the upperface of which is applied in bearing against the bottom of the said rest(1, which is a part of the secondary valve G. The clamping member h,having the screw-threaded bore therethrough and provided with thepolygonal depending projection k isset up against the under face of thevalve D and confines the same positively against the rest d.

iis a check or look nut to be set against the part f, formed as one withand extending above the secondary valve, and j is a check or look nutwhich screws on the lower end portion of the valve-rod, these twolock-nuts together preventing any change in the adjustment of the valvedevices.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is

In a hydrant, the combination with the vertical waterway, which isconnected with the water-main, and which has, at its lower end, amain-valve seat, and thereabove, its passage F of cylindrical form, ofthe valve-rod C, the lower end portion of which is screwthreaded; theintegrally-formed device conengaged on the'lower portion of thevalve-rod below the main valve; and the lock-nuts z and j screw-engagedon the threaded valverod respectively above and below the partsf I5 andk substantially as described. I

Signed by me at Holyoke, Massachusetts, this 22d day of October, 1900.

JOHN J. SULLIVAN. Witnesses:

WM. S. BELLOWS, C. F. WHITE.

